1388505010 has 16 divisors (see below), whose sum is σ = 2499938496. Its totient is φ = 555262128.

The previous prime is 1388504989. The next prime is 1388505011. The reversal of 1388505010 is 105058831.

It is not an unprimeable number, because it can be changed into a prime (1388505011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30469 + ... + 60871.

It is an arithmetic number, because the mean of its divisors is an integer number (156246156).

Almost surely, 2^1388505010 is an apocalyptic number.

1388505010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1388505010 is a deficient number, since it is larger than the sum of its proper divisors (1111433486).

1388505010 is a wasteful number, since it uses less digits than its factorization.

1388505010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34977.

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 1388505010 is about 37262.6489933284. The cubic root of 1388505010 is about 1115.6187815276.

The spelling of 1388505010 in words is "one billion, three hundred eighty-eight million, five hundred five thousand, ten".